Actually,
MS have described what IE6.0 will do when it encounters doctype lines pretty well.
IE 6.0 can work in standards-compliant mode or compatibility mode.
Standards mode means working via W3C standards and compat mode means IE5.5 engine.
When you specify the appropriate doctype line it activates the standards mode(this is what you want !)
This doctype line HAS to be the 1st line on the page.
There is a page describing when it activates the standards mode and when not.
And yes ! out of ALL the choices they have, lotus picks the one that switches it OFF.....
They should have made it user selectable or just include the URL bit so that IE goes into standard mode.
And this can not be changed with JS unfortunately.
But you can test for compat mode with the compatMode property of the document object (IE6 only).
See here for more info:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnie60/html/cssenhancements.asp?frame=true
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. . . . RE: Browser "Quirks" mode and DOCTY... (~Emile Quetfoom... 31.Jan.03) 
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